================
@@ -461,6 +463,156 @@ bool PreISelIntrinsicLowering::expandMemIntrinsicUses(
return Changed;
}
+static bool expandProtectedFieldPtr(Function &Intr) {
+ Module &M = *Intr.getParent();
+
+ SmallPtrSet<GlobalValue *, 2> DSsToDeactivate;
+
+ Type *Int8Ty = Type::getInt8Ty(M.getContext());
+ Type *Int64Ty = Type::getInt64Ty(M.getContext());
+ PointerType *PtrTy = PointerType::get(M.getContext(), 0);
+
+ Function *SignIntr =
+ Intrinsic::getOrInsertDeclaration(&M, Intrinsic::ptrauth_sign, {});
+ Function *AuthIntr =
+ Intrinsic::getOrInsertDeclaration(&M, Intrinsic::ptrauth_auth, {});
+
+ auto *EmuFnTy = FunctionType::get(Int64Ty, {Int64Ty, Int64Ty}, false);
+ FunctionCallee EmuSignIntr = M.getOrInsertFunction("__emupac_pacda",
EmuFnTy);
+ FunctionCallee EmuAuthIntr = M.getOrInsertFunction("__emupac_autda",
EmuFnTy);
+
+ auto CreateSign = [&](IRBuilder<> &B, Value *Val, Value *Disc,
+ OperandBundleDef DSBundle) {
+ Function *F = B.GetInsertBlock()->getParent();
+ Attribute FSAttr = F->getFnAttribute("target-features");
+ if (FSAttr.isValid() && FSAttr.getValueAsString().contains("+pauth"))
+ return B.CreateCall(SignIntr, {Val, B.getInt32(2), Disc}, DSBundle);
+ return B.CreateCall(EmuSignIntr, {Val, Disc}, DSBundle);
+ };
+
+ auto CreateAuth = [&](IRBuilder<> &B, Value *Val, Value *Disc,
+ OperandBundleDef DSBundle) {
+ Function *F = B.GetInsertBlock()->getParent();
+ Attribute FSAttr = F->getFnAttribute("target-features");
+ if (FSAttr.isValid() && FSAttr.getValueAsString().contains("+pauth"))
+ return B.CreateCall(AuthIntr, {Val, B.getInt32(2), Disc}, DSBundle);
+ return B.CreateCall(EmuAuthIntr, {Val, Disc}, DSBundle);
+ };
+
+ auto GetDeactivationSymbol = [&](CallInst *Call) -> GlobalValue * {
+ if (auto Bundle =
+ Call->getOperandBundle(LLVMContext::OB_deactivation_symbol))
+ return cast<GlobalValue>(Bundle->Inputs[0]);
+ return nullptr;
+ };
+
+ for (User *U : llvm::make_early_inc_range(Intr.users())) {
+ auto *Call = cast<CallInst>(U);
+
+ auto *Pointer = Call->getArgOperand(0);
+ auto *Disc = Call->getArgOperand(1);
+ bool UseHWEncoding =
+ cast<ConstantInt>(Call->getArgOperand(2))->getZExtValue();
+
+ auto *DS = GetDeactivationSymbol(Call);
+ OperandBundleDef DSBundle("deactivation-symbol", DS);
+
+ for (Use &U : llvm::make_early_inc_range(Call->uses())) {
+ if (auto *LI = dyn_cast<LoadInst>(U.getUser())) {
+ if (isa<PointerType>(LI->getType())) {
+ IRBuilder<> B(LI);
+ auto *NewLI = cast<LoadInst>(LI->clone());
+ NewLI->setOperand(0, Pointer);
+ B.Insert(NewLI);
+ auto *LIInt = B.CreatePtrToInt(NewLI, B.getInt64Ty());
+ Value *Auth;
+ if (UseHWEncoding) {
+ Auth = CreateAuth(B, LIInt, Disc, DSBundle);
+ } else {
+ // FIXME: These don't have deactivation symbol attachments, we'll
----------------
pcc wrote:
Done
https://github.com/llvm/llvm-project/pull/151647
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